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'Golden Window' Eyed for Deeper Tissue Imaging

BioPhotonicsJan 2016
NEW YORK — Longer wavelengths in the near-infrared range may offer a "golden window" for noninvasive but deep imaging of brain and breast tissue, City College of New York researchers have proposed.

Theoretical and experimental work led by CCNY research associate Lingyan Shi points to three new optical windows at longer NIR wavelengths that experience reduced scattering in biological tissue. Optical window III, from 1600 to 1880 nm, showed the greatest reduction in scattering and minimal absorption.

Longer NIR wavelengths have been overlooked in bioimaging research due to a lack of suitable detectors and light sources, Shi's team said.